A synthetic and theoretical study of the aggregation of amidoaluminium hydrides: Solid-state of the trimethylamine adduct [(Me3Si)2NAl(Cl)(H) middot; NMe3]

Michael G. Gardiner, George A. Koutsantonls, Stacey M. Lawrence, Fu Chin Lee, Colin L. Raston

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

The amidoaluminium hydride complexes [(Me3Si)2NAl(X)(H) · NMe3], X = H (1), Cl (2), were prepared by the metallation of bis(trimethylsilyl)amine by A1(X)(H)2 NMe3 (X = H and Cl]. The molecular structure of 2 as a inonomeric Lewis base adduct with four-coordinate aluminium centres and terminal amido groups was confirmed by X-ray crystal structure determination. We also find that bis(trimethylsilyl)amine forms a thermally stable adduct of alane, (Me3Si)2N(H) · A1H3 (3). Ab initio molecular orbital calculations on the possible products arising from these reactions yielding 1 and 2 revealed that the amido-bridged species, {(μ-H2N)A1(X)H}2 (X = H and Cl), are favoured over nitrogen donor Lewis base adduct formation, H2NA1(X)(H) · NH3 (X = H and Cl), and then chlorobridged, {H2NAl(μ-X)(H)}2, (X = Cl only), and hydridobridged species, [H2NAl(X)(μ-H))2 (X = H and Cl).

Original languageEnglish
Pages (from-to)545-549
Number of pages5
JournalChemische Berichte
Volume129
Issue number5
DOIs
Publication statusPublished - 1 Jan 1996
Externally publishedYes

Keywords

  • Alane
  • Amide
  • Amido
  • Association
  • Hydride

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